摘要
高密度三维地震勘探对煤田小断层和隐蔽性地质体探测具有较高的精度,为煤田安全高效开采提供了可靠地的地质保障。为了将高密度三维地震勘探技术更好地应用于煤田地质勘探,从影响地震原始数据品质的角度出发,研究了煤田高密度三维地震勘探的观测系统设计方法。以淮北矿区的勘探实践为基础,详细论证了高密度三维地震勘探观测系统的覆盖次数、面元大小、偏移距,接收线距、炮检距等主要参数的选择依据和基本原则,从而建立了针对勘探目标体的观测系统。通过统计分析的方法对观测系统进行评价,分析了覆盖次数、偏移距、方位角等面元属性对地震数据质量的影响,为煤田高密度地震勘探的观测系统设计提供了依据和参考。
High-density 3D seismic prospecting which has high accuracy for the detection of small faults and concealed geological bodies provides reliable geological guarantees for safe and efficient mining of coalfield.In order to apply the high density 3D seismic exploration technique to coal geological exploration,the design method of 3D seismic geometry in coal field is studied from the angle of affecting the quality of original seismic data.Based on the practice in Huaibei Mining Area,the basic principles for selecting the main parameters of the high-density 3D seismic exploration geometry,such as the fold numbers,bin size,offset,stationline distance and source row distance,are demonstrated in detail.As a result,the geometry for exploration targets was established.Through the method of bin statistics analysis,the effects of fold numbers,offset and azimuth on the quality of seismic data are analyzed,which provides a basis and reference for the geometry design of high-density 3D seismic prospecting in coalfield.
作者
李江
LI Jiang(China Coal Technology and Engineering Group Xi’an Research Institute,Xi’an 710077,China)
出处
《煤矿安全》
CAS
北大核心
2019年第12期118-122,共5页
Safety in Coal Mines
关键词
煤田
高密度
三维地震勘探
几何设计
方位角
coalfield
high density
3D seismic prospecting
geometry design
azimuth angle
